Chain-drive glazing machine



July 5 '1927.

D. E. HARDING CHAI DRIVE GLAZING MACHINE Filed A112 18, 1925 3Sheets-Sheet 1 wMYAML.

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i I 1,635,081 July 5 1927' D. E. HARDlNG CHAIN DRIVE GLZING MACHINEFiled Aug. 1s, 1925 Y :s sheets-sheet 2 Eazy. Z.

July 5 ,27 D. :.HARDING cgmN DRIVE GLAZING MACHINE Filed Aug. 18, 192%?s sneets-shet 3 Patented July 5,

UNITED STATE/s PATENT oFF/ice.

:DANA E. HARDING, or ARLINGTON, MASSACHUSETTS, ASSIGNOB T HABDlNG EN-GI-NEEBINGOOMBANY, or BOSTON, MAssAcHUsETTs, A conronA'rIon or MAS-SACHUSETTS.

'CHAIN-DRIVE GLAZING MACHINE.

My present invention relates to leather working machines, and moreparticularly to an improved machine for glazing or ironing leather.

An improved step in the process oft manufacturing leather from hides andskins consists, inthe case of certain kinds ot leather,

of burnishing or ironing thel grain side of.

the leather so as to impart a glossyiinish thereto. Heretot-ore thisoperati-on has been performed by mechanical means in which a rapidlyreciprocating member is moved over the grain side ot a sli-cet oitleather' held in position on a bed or anvil. r'Ihese prior ma chines areVobjectionable trom a number of standpoints among which are, first, theexcessive vibration of such machines which necessitates thestrengthening andA shoring of a building in which they are located to anexcessive degree and such strengthening and shoring has continually tobe Watched and added to. Second, these machines are exceedinglydangerous as the workman sits closely adjacent to the rapidlyreciprocating member and the least ill timed movement on his part is aptto result in his being struck by the moving memb-er and injured.V As amatter of tact, numerous accidents occur from this one cause and themachines have acquired throughout the various tanneries the name of mankillers. A still further objection to these machines is the fact thatthe leather operated on must be held in position on the bed or anvil bythe workmanagainst a glazing toolor tools mounted on an endless chain orbelt in which mechanical means is employed to hold the leather inposition while the glazing tool is in engagement therewith and whichholding means is auto,- matically released when the glazing tool passesout of engagement with the leather.

vPreferably I employ a plurality of glazing tools mounted on vthesameend-iess'chain or belt and time the holding device therewith in suchmanner as to allow ample time for the workman to move the leather afterthe clamping means has been released therefrom and before the succeedingglazing tool comes into engagement with the leather and the clampautomatically operated again.

The principal object of my invention, therefore, is an improved glazingmachine.

Another object of my invention is an improved glazing machine providedwith a non-reciprocating glazing tool.

'A further object of my invention is an imn proved leather clampingmeans and glazing tool operated in timed relation with respect to eachother. i

Other objects and novel features of the construction and arrangement ofparts will appearr as the description of the invention progresses. Inthe accom anying drawings illustrating the preferr-d embodiment of myinvention, I

Fig. l is a rear elevation, certain portions ot the machine being brokenaway; i'

F ig. 2 is a front elevation;

Fig. 3 is a perspective view of the work holding table; i

Fig. 4 isa perspective view of the combined base and pedestal on whichthe apparatus is mounted, and

Fig. 5 roll.

Referring to the drawings, 1() designates a base which has formedintegral therewith ,and at one end thereof an upwardly extending column11, such column having formed integral therewith at its upper end andeX- tending forwardly and parallel to the 'base the arm l2, the base 10,pedestal 11 and is a perspective view of a glazing arm 12 defining asubstantially .open rectan- 1 gular space in'which is mounted theworking parts of the machine. Secured to each side of the arm 12parallel to .each other and extending downwardly from said arm are bars13. Secured to the inner faces of the .bars 13 and spaced apart from andparallel to each other and to the arm 12 are bars 14, the rear ends ofthese bars being secured to the pedestal 11 by bolts 15. Secured to theinner faces of the front ends of the bars let and spaced apart from eachother are bearing members 16, and also secured to the inner faces of thebars 14 adjacent to the rear ends thereof are similar bearing members17, these bearing members also being spaced apart from each other.Rotatably mounted in the front bearing members 16 is a lshaft 1S and onthis shaft are. secured sprockets 19, such sprockets being spaced apartfrom each other, as clearly shown in Fig. 2. Rotatably mounted in thebearing members 17 and parallel to the shaft 18 is a shaft 20, andsecured to such shaft and in alignment with the sprockets 19 aresprockets 21, these sprockets being equal in pitch and diameter to thesprockets 19. Over the sprockets 19 and 2O run the endless chains 22.Secured to the lowermost bar 14 on the right hand side of the machine,looking to the rear, is a vertical bearing 23 which is in alignment witha bearing 24 formed on a bracket 25 secured to the pedestal 11.Rovtatably mounted in the bearings 23 and 24 is a vertical shaft 26, andsecured to the top end of such shaft is a bevel gear 27 that meshes withand drives a bevel gear 28 secured to one end of the shaft 20. Securedto the lower end of the shaft 26 is a bevel gear 29 which meshes withand is .driven by a bevel gear 30 secured to one end of a shaft 31 thatis rotatably mounted in bearings 32 and 33. rlhe bearing 32 is formed onthe bracket 25 above referred to and the bearing 33 is secured to thepedestal 11, as clearly shown in Fig. 2. The shaft 31 extends laterallyoutward from the left hand side of the machine, as viewed in Fig. 2, andmounted on such extension are tight and loose pulleys 34 and 35respectively, and over such pulleys is adapted to run a belt 36 leadingfrom any suitable source of power and by means of which power istransmitted to the machine. A collar 37 prevents longitudinal movementof the loose pulley on the shaft 31. Secured to the inner faces of thebars 14 and with their outer .edges in alignment with the periphery ofthe bearing members 16 and 17 are tracks 38.

Secured to, and carried by, the endless chains 22 are glazing devicescomprising bed members 39 provided on one face with parallelly arrangedshafts 40 that extend laterally of the direction of travel of the chainsRotatably mounted on the outer ends of such shafts are anti-frictionrollers 41 which roll on the tracks 38 above referred to and on theouter periphery of the rounded end of the bearing members 16 and 17.Formed on the bed member 39 on the face thereof which carries the shafts40 are jaws 42 in which is firmly held a glazing block 43, this blockbeing of any suitable diameter, but usually and preferably of glass.While I may use one or as many of the glazing blocks 43 and the holdersin which they are contained in the machine, I preferably use the lowerends of the bars 13 by bolts 44 and r lying parallel to the members 38 adistance slightly greater than the diameter of the rolls 41 are bars 45and such bars cooperate with the rolls 41 and the tracks 38 to prevent arocking movement of the bed members 39 and attached parts.

Secured to the base 10 by bolts 46 and eX- i tending upwardly therefromare lugs 47. Formed integral with the lugs 47 is a platform 48 and onthis platform is mounted a bed or anvil 49, suitable provision beingmade for adjusting this elementvertically. The work in the form of asheet of leather is adapted t-o rest on top of the bed or anvil 49 andthe upper or grain surface of the leather 50 is adapted to be engaged bythe glazing rolls 43 as such glazing rolls move from front to rear ofthe machine. Numeral 51 designates legs 'and secured to the top of suchlegs is a worktable 52, a portion of such table being cut away at 63 soas to enable the table to be placed under the endless chains 22 and theupper surface of the table lies in substantially the same plane as theupper surface of the bed or anvil 49. Referring to Fig. 1, it will benoted that the front end of the table top 52 lies in front of the shaft18, this construction being such as to enable the use of a clampingmeans in connection with the table top 52. This clamping means comprisesa member 53 formed integral with a substantially U- shaped member 54pivotally mounted at the front end of the bars 45. Formed integral withone end of the U-shaped member 54 and extending rearwardly beyond thepivot point is an arm or lever 55, this arm having secured at its rearend the lower end of a coil spring 56. The upper end of this coil springis secured to a pin 57 screwed into the side of the left hand member 16.The spring 56 is strong enough to pivot the U- shaped member 54 aboutits pivot points and to hold the clamping portion 53 against the top ofthe table 52 so as to clamp the leather sheet 50 against movement whenthe glazing rolls 43 engage with the grain side of the leather 50.Secured to the'inner face of the lever is a block 58 this block beingadapted tobe engaged by a block 59 secured to a gear 60 rotatably en astub shaft 61 secured to the outer face of the left hand bearing member16. The gear 60 is adapted to be engaged and driven by a pinion 62secured to the left hand end of the shaft 18. The

lll() pinion 62 and gear 60`are so proportioned with relation to thelength of the chains 2O and the distance apart on such chains of theglazing blocks 43 that the block 59 on the gear 60 will only engage withthe block 58 on the arm 54 when the glazing block 43 is not inengagement with the leather 5() and such blocks will be out ofengagement with each other during all the time that the glazing block 43is in engagement with the leather 50. The time during which one glazingblock 43 is out of engagement with the leather and before thenextsucceeding block 43 is brought into engagement with the leather issuflicient to allow the operator of the machine to move the sheet ofleather 50 to any desired posit-ion on the work table 52 and bed oranvil 49.

The operation of my machine is as follows, it being assumed that theapparatus has been constructed and assembled as above described and thatit is desired to glaze'or iron the grain side of a sheet of leather 50.The operator turns power into the machine by shifting the belt 36 fromthe loose pulley onto a'tight pulley 34, whereupon the endless chains 22are moved so as to carry the glazing blocks 43 in the direction of thearrow shown in Fig. l. The operator places a hide or skin 50 onk thetabler 52 and, during the period of time when no glazing block 43 istravelling along with the lower reach of the chains 22 and, therefore,the clamping member 53 is lifted up from the table top slides the sheetof leather 5() over on top of the bed or anvil 49. Vhen the nextsucceeding glazing block 43 moves with the chains 22 and into engagementwith the grain surface of the leather 50, the blocks 58 and 59 will bemoved out of engagement with each other and the spring 56 will force theclamping member 53 into engagement with the leather and hold the sameVfirmly against the table top 52. Assume that this is the situation inFig. l and that the glazing block 43 is moving in the direction of thearrows shown. As soon as the glazing block 43 comes to the end of thesheet of leather 50, the pinion 62 and gear 63 being continuouslyrotating, the blocks 58 and 59 will be brought into engagement with eachother, tilting the lever 54 and lifting the clamping member 53 olf theleather 50. Thisv releases the leather 50 and the operator moves theleather 50 to the desired position on the bed or anvil 49 before thenext succeeding glazing block 43 comes into operative position. Thissequence of operations may be repeated indefinitely on the sheet ofleather or on succeeding sheets of leather.

`While I have necessarily shown and described the preferred embodimentof my inventionv somewhat in detail, it is to be understood that I mayvary the size, shape, and arrangement of parts within wide limitswithout departing from the spirit of the invention.

Having thus described my invention, what I claim as new is:

l. In an improved glazing machine, a pair of endless chains arrangedparallel to each other and with their lower reaches lying in the samehorizontal plane, means for moving said lower reaches in the samedirection and at the same speed, a work support or bed lying beneath,spaced apart from, and parallel to the lower reach of such chains, aworktable cooperating with said work support or bed, ya clamping meansassociated with said workable, glazing rolls mounted on and movable withsaid endless chains, means for maintaining the clamping means inoperative relation to the work on the worktable, and means controlled bythe endless chains for intermittently removing the clamping means fromthe table.

2. In an improved glazing machine, a pair of endless chainsarranged'parallel to each other and with their lower reaches lying inthe same horizontal plane, means for moving said lower reaches in thesame direction and at the same speed, a woik support or bed lyingbeneath, spaced yapart from, and parallel to the lower reach of suchchains, a worktable cooperating with said work support or bed, aclamping means controlled by said chains and mounted above saidworktable, glazing rolls mounted on and movable with saidv endlesschains, means for maintaining the clamping means in association withsaid table and in operative relation to the work thereon, and means forremoving the clamping means from the table only when the glazing rollsare out of engagement with the work on the work support or bed.

3. In an improved glazing machine, a pair of endless chains arrangedparallel to each other and with their lower reaches lying in the samehorizontal plane, means for moving said lower reaches in the samedirection and at the same speed, a work support or bed lying beneath,spaced apart from and parallel to, thelower reach of such chains andimmovable with respect to said chains, a worktable co-operating withsaid work support or bed, a clamping means controlled by said endlesschains and mounted above said worktable, glazing rolls mounted on andvmovable with said endless chains, means for maintaining the clampingmeans in association with said worktable, and in operative relation tothe work thereon, and means for removing the clamping means from thetable only when the glazing rolls are out of engagement with the work onthe work support or bed. a

In testimony whereof, I have signed my name to this specification.

DANA E.- HARDING.

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